[libmicrohttpd] Digest authentication on POST request causes 'Application reported internal error, closing connection'

[Dirk Brinkmeier]

Hi to all.

I'm trying to POST data to libmicrohttpd with digest authentication enabled.
The data looks like this:

POST /ajax/response.html HTTP/1.1
Accept: */*
Accept-Encoding: identity
Host: xxxx.ddns.net
User-Agent: NB-IoT-Client/1.0.0 (Arduino/MKR-NB-1500)
Connection: close
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Content-Length: 151

OnIoTData=iotdata&prepare=no&title=iotdata&IMEI=352753096142722&Address=10.193.202.150&Timestamp=315964938&Datetime=1980-01-06T00:02:18+00:00&Data=null 



The data is received via libmicrohttpd and forwarded to my application 
as long as no authentication is used.
When using digest authentication the connection is closed with an 
internal error callback message 'Application reported internal error, 
closing connection'.

With a GET request everything works fine:
The first request is answered with 'Unauthorized' and my client response 
with the correct digest in the second request and receives a valid response.

I'm not quite sure where to look after this issue. Is this an issue in 
my framework or ist there an issue in libmicrohttpd?
Any ideas are appeciated....

Thanks in advance,
Dirk.